Questions tagged [bitcoin-core]

This tag should be used for questions pertaining to Bitcoin Core. Bitcoin Core is an MIT-licensed Qt 5 GUI application for the original Bitcoin codebase. Additional/previous names include "Bitcoin-Qt", "Satoshi-Client", and "Standard Client". This tag should be used when referring to the Bitcoin Core software.

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532 views

Failing to build bitcoin-core v0.13.1

I have done quite a few upgrades in the past and this has never happened before: $ uname -a Linux back 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1+deb8u1 (2016-09-03) x86_64 GNU/Linux $ git checkout v0....
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376 views

Why doesn't bitcoind verify blocks like bitcoin qt?

I have downloaded the full bitcoin blockchain using bitcoin-qt. When I run bitcoin-qt, it verifies the blocks for about a minute, then it runs without any issues. The issue is when I try to run ...
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82 views

C++ Proofofworklimit to bitcoinj util.DecodeCompactBits

What is equivalent bitcoinj util.DecodeCompactBits for below c++. Cbignum(~uint256(0) >>32) Cbignum(~uint256(0) >>20) Cbignum(~uint256(0) >>23) Cbignum(~uint256(0) >>22)
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348 views

Need help to understand where bitcoin transaction has gone

I am new with bitcoin and I need some help from experienced members. I have a server with bitcoin core where we accept some payments and use bitcoin core as mercant. The problem is that we have got ...
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46 views

C Compilation Error Following README

I'm having an issue getting the local bitcoin client running on a Mac OS X machine. When installing berkeley-db4, and running the following command (per the README): brew install https://raw.github....
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90 views

What is the correct code flow while sending a message

I have a fundamental doubt wrt boost signaling used in bitcoin. As far as I understand the following happens between main.cpp and init.cpp: StartNode() spawns a thread ThreadMessageHandler ...
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52 views

Help with understanding Semaphore grants in OpenNetworkConnection

I am new to concurrent programming. Can any expert throw some light on the semaphore grant that one requires before acquiring a network connection ? bool OpenNetworkConnection(const CAddress& ...
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187 views

Can't handshake with my node

I have a 0.11 nodes, all was fine until now, no restart is doing anything. My client sends a Version Handshake but the ACK never comes. In RPC getpeerinfo take 1 or 2 minutes to process even if there ...
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58 views

Where does the current Bitcoin Core currently fail static analysis, if at all?

I am looking into static analysis, and I'd like to know what to expect in the case of Bitcoin's main implementation, Bitcoin-Core. That way, if I try static analysis on Bitcoin, I will know whether ...
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684 views

OS Windows Reinstalled, Bitcoin Core bitcoins lost, how do I recover them?

I've lost my bitcoins when I reinstalled OS on my computer. I still have my receiving address and the password I used to encrypt my Bitcoin Core Wallet. How do I recover the lost bitcoins? Does ...
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184 views

bitcoin-qt restored wallet.dat all synced closes after correct passphrase “assertion error crypt” HELP

Installed bitcoin-qt and replaced new wallet.dat with old wallet.dat backup Opened bitcoin-qt and let it sync and all blocks synced and wallet has correct funds and past transactions. I Want to ...
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73 views

Bitcoind writes complete wallet.dat regularly which is a problem, what can i do?

i have troubles with my system, using iotop i identified bitcoind as the source of problems. I am running bitcoind of bitcoin-0.10.0-linux32 and am using the RPC calls of bitcoind. My wallet file is ...
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293 views

how do I send my imported wallet on electrum

I have been able to transfer my bitcoin to electrum but am facing hard time to pay it or send my coins. A form appear and I fill out and there is only two option to choose to click create unsigned ...
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639 views

Mempool tracking

I'm trying to clear up some uncertainties around the mempool A tx comes in, its validated, and no other transactions have currently marked any of its inputs. Tx gets added to mempool. If a double ...
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597 views

Error While making windows.exe using gitian build?

Actually I'm making a logos windows exe (logosd and logos-qt) following the release process, which is mention on below path on any coin you can find that path, I'm working logos LGS Coin that's why I'...
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71 views

listsinceblock returning block on fork

Im considering using listinceblock to monitor incoming bitcoins to my app. What happens if the block returned by listsinceblock ends up being on a dead-end fork?
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237 views

How I make a portable version of Bitcoin for Ubuntu?

I want to create a bitcoin wallet executable file in Ubuntu with all its dependencies. So when use that file from some other system it will work perfectly. How I make a portable version of Bitcoin ...
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2k views

Problem with Berkeley DB while building Bitcoin on Windows from Source Code?

I'm trying to compile Bitcoin from source code in Windows 7. When I run ./configure, I get the following error: checking for Berkeley DB C++ headers... no configure: error: libdb_cxx headers missing ...
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199 views

bfgminer on bitcoin-qt

I am getting this error and looking for guidance. Error : Most likely you have input the wrong URL, forgotten to add a port, or have not set up workers config server=1 rpcallowip=192.168.1.0/24 ...
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985 views

Gitian Build Issue - Windows

Got a little issue when compiling Windows QT using Gitian. BTW Im using a Ubuntu 12.04 64bit VPS. So I am using the instructions here : https://cryptocointalk.com/topic/2966-bitcoin-scrypt-v120-...
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973 views

creating our own coin - connection refused error

We are trying to create our own currency. We first started with testnet. The aim is to generate a genesis block and testnet did it very well. However, although we had connection between two ...
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174 views

Bitcoin.conf connect command

When configuring the bitcoin.conf file, what should you put in connect=? There are IP addresses listed here, so I removed the # sign and left them as is. I also entered my WAN address and my local ...
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118 views

Submitted blocks get rejected on Litecoin testnet

I'm trying to submit blocks to the Litecoin Testnet, however everything gets rejected. I got my raw value as ...
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210 views

how to run bitcoind server on a ubuntu 13.04 server

I am trying to host a bitcoind on my server so I can connect to it on my website, how do I install it, run it, update the conf file? this is on a server not a desktop
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100 views

Bitcoin Qt message signature construction

I'm trying to construct the message verification signature of bitcoin qt in python. I'm able to compute the couple (r,s) of the signature, but, even I'm not able to find the correct way to encode it ...
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84 views

Installed Bitcoin-QT on windows2008r2 server, but it won't snyc anything at all

Installed Bitcoin-QT on windows2008r2 server, but it won't sync anything at all. No connections to network, no blocks, no movement full stop. I have OK'd it in windows firewall, tried connecting ...
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564 views

Cannot synchronize with Bitcoin in testnet mode

I downloaded Bitcoin-QT for Windows 7 into: MYUSERNAME/Downloads/bitcoin-0.8.6-win32/bitcoin-0.8.6-win32 I want to run Bitcoin in testnet mode, so I created bitcoin.conf with only the following ...
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167 views

Nonstandard script - TX rejected

I am experimenting in testnet with nonstandard scripts. There was a transaction, created by me, with the following vout script: OP_HASH256 ...
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314 views

bitcoin-qt compiles successfully but runs fail

I have compiled bitoin-qt, PTS coin and other alt-coins successfully, but they can't run concurrently. I use MinGW4.4, QT 4.8.5 downloaded from website and QT creator 2.8.1. This is my .pro setting: ...
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177 views

Old transactions remain unconfirmed after redownloading the blockchain

I received a runaway exception error then deleted everything but wallet.dat from the data directory and opened bitcoin-qt to redownload the blockchain. Transactions larger than 0.00016 btc remain ...
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2k views

Sent bitcoins to my unencrypted wallet and encrypted the wallet before file synced, is there any way i can get them back?

Thanks in advance for any light you can shed on my problem.. I think I sent bitcoins from an online wallet to my offline wallet BitcoinQT(0.81) in august. The transaction has been confirmed, but not ...
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37 views

Huge hdd load when creating keys

I've configured the -keypool=n parameter to create a lot of keys at once. During the generation, the hdd has a lot of IO, why?
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83 views

Bitcoin-Qt locks up

During Initial Sync BitCoin-QT to lock-up and cause Debian Wheezy to crash and reboot...no error message. How do I fix this issue? Subsequent execution of client software has same result.
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184 views

How to export an encrypted non-seedless electrum wallet into bitcoin-qt?

How to export an encrypted non-seedless electrum wallet into bitcoin-qt? Is it even possible? Cheers
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1k views

Bitcoin client fails and reports some database recovery error

I am looking for somebody to help me fix my Bitcoin client, it is corrupt, reads : "A fatal error occured. Bitcoin can no longer continue safely and will quit. EXCEPTION: 22DbRunRecoveryException ...
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457 views

Move all coins from an address via RPC

Let's say I generated some coins with a given address and I want to send a specific amount of coins to a specific addresses, and move the remaining balance to another specific address. I want to do it ...
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1answer
663 views

Where can i find proof of work in bitcoin core source code?

does anyone knows which part of the bitcoin core source code contains the proof of work for mining, creating of block and adding to blockchain? what are the files and functions involves? https://...
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298 views

Bitcoin wallet balance doesn't add up to what my addresses have

I have had a bitcoin core wallet on windows for a long time. For most of this time I have been inactive. My client has gone out of sync and my wallet sat on my computer as well as a backup on a usb ...
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1answer
571 views

What is a workaround to fundrawtransaction for watchonly addresses

I have imported watchonly addresses in Bitcoin and trying to createrawtransaction with input watchonly listunspend which has spendable=false, scriptSig=empty. after that, I'm getting an error on ...
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708 views

Sendrawtransaction error on Bitcoin Core Version 0.16.0

I updated my bitcoin core to version 0.16.0, previously I was using v0.15.1. I created an application to send some BTC using listunspent -> createrawtransaction-> signrawtransaction -> ...
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19 views

Online BTC wallet implemention with bitcoin-core

I have written a php code to register users and create wallet for them on bitcoin-core full node.My question is how can i manage users wallets.if i use loadwallet to load USER A wallet and get address ...
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21 views

Pruning Blockstore has been running for days

After activating the core (Testnet - Pruned) with the command bitcoin-qt i received the following error: Corrupt Block Database I restarted the synchronization always using the Pruned mode. The core ...
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17 views

Can edit mining node pool transactions list?

if I have a mining node that is attached to a bitcoin mining pool, can edit the order of the transactions sent by the pool to be mined by my node, and edit it, and even add manually transactions to ...
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1answer
28 views

segwit compatilibity bc1 and 3 bitcoin wallet?

I would like to know what's the better aproach for upgrading from a legacy address to a segwit one, but there are two type of segwit as P2SH starting with 3 and Native SegWit (bech32) starting with ...
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2answers
23 views

number of inputs or outputs affect bitcoin transaction fee?

I would like to know how inputs and outputs affects my bitcoin transaction fee using legacy address, and how using a segwit address will decrease the same transaction? and how they will be ...
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22 views

can I have a mining node and only accept a transaction for an ip?

I would like to have mining node to mine bitcoin transactions but I want only do it for a specify ip, can do that ? or it's better to have a mining node and join it to a mining pool and and make it ...
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12 views

Corrupt block database

I activated the core with bitcoin-qt as I always do. What can be the cause of the database loss? Synchronization is restarted from the genesis block. I use the testnet with Pruned mode activated.
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19 views

The general principle of smart contracts for bitcoin

As far as I know, there is the possibility of realizing smart contracts using the Bitcoin blockchain. Explain how a smart contract works on the Bitcoin blockchain. I am interested in the general ...
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28 views

Why do most HD wallets require choosing either all Segwit or all Legacy but Bitcoin Core can support both simultaneously?

Electrum and the mobile wallets I've used can only support one type of address per HD wallet, but Bitcoin Core can support both at the same time. Is that simply a choice that Bitcoin Core made or is ...
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17 views

Bitcoin COT fee

I have recently tried Bitcoin through someone I met, I was told I could turn £100 in to £700 in a week. I tried this, then I got told I had to put more money in etc etc. I now have apparently $14,500 ...

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